Abstract: A first communication device that is configured to bidirectionally exchange data with a second communication device comprises circuitry that is configured to initiate a bidirectional transmit opportunity (TXOP) by transmitting, to the second communication device, a TXOP indicator indicating that a wideband TXOP is split into two channels and indicating that a first channel is primarily to be used for transmission of data from the first communication device to the second communication device and a second channel is primarily to be used for transmission of data from the second communication device to the first communication device. Further, the first communication device transmits data to the second communication device on the first channel and listen for the reception of data from the second communication device on the second channel.

Abstract: A first communication device that is configured to communicate with one or more third communication devices and that comprises circuitry configured to contend for channel access, within an interval before the start or at the start of a scheduling interval during which communication of the first communication device with the one or more third communication devices is planned over said channel; and transmit, after successful contention, a control frame initiating a constrained contention interval and including constrained contention information, the constrained contention interval representing a time period before and/or during the scheduling interval, during which second and/or third communication devices shall either consider the channel as busy or may contend and access said channel according to constrained contention information.

Abstract: A first communication device, e.g. an AP (10), that is configured to communicate with one or more second communication devices, e.g. STAs (20, 30), comprising circuitry configured to transmit channel access information (101) indicating to one or more of the second communication devices (20) if and which of one or more channel access parameters are individually set (102) for said one or more second communication devices and shall be used by said one or more second communication devices instead of corresponding common channel access parameters, and transmit one or more individually set channel access parameters indicated by said channel access information as individually set to said one or more second communication devices (20).

Abstract: A first communication device is configured to communicate with a third communication device, the first communication device comprising circuitry configured to perform data exchange with the third communication device during a first portion of a scheduling interval, wherein data exchange between the first and the third communication device is planned during the scheduling interval, the first communication device being a primary user of the scheduling interval: and transmit a release indication indicating that the remaining portion of the scheduling interval is released for use by a second communication device, the second communication device being a secondary user of the scheduling interval.

Abstract: A first communication device configured to communicate with one or more second and third communication devices, the first communication device comprising circuitry configured to receive a request for a transmission opportunity (TXOP) from a second communication device, the requested transmission opportunity overlapping with a scheduling interval during which communication of the first communication device with one or more third communication devices is planned, set access information, including one or more channel access (CA) parameters and/or one or more TXOP parameters, for the second communication device that indicates to the second communication device if and how it may communicate with the first communication device before and/or during the scheduling interval, and transmit the access information to at least the second communication device.

Abstract: A first communication device, e.g. an AP (10), that is configured to communicate with one or more second communication devices, e.g. STAs (20, 30), comprising circuitry configured to transmit channel access information (101) indicating to one or more of the second communication devices (20) if and which of one or more channel access parameters are individually set (102) for said one or more second communication devices and shall be used by said one or more second communication devices instead of corresponding common channel access parameters, and transmit one or more individually set channel access parameters indicated by said channel access information as individually set to said one or more second communication devices (20).

Abstract: A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying payload data; split each of a first number of training symbols into a fourth number of tone sets, each training symbol spanning a plurality of tones; split each orthogonal sequence elements of the corresponding portion of the orthogonal sequences onto the tone sets of the training symbols; and arrange the training field before and/or between the payload data of the spatial streams to enable channel estimation by the second communication device.

Abstract: A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying pay load data; generate a fourth number of transmission training sequences, each comprising, in addition to a distinct orthogonal sequence of said mutually orthogonal sequences, one or more zeros and/or a subset of said distinct orthogonal sequence; generate a training field by mapping the transmission training sequences into a first number of training symbols, each training symbol spanning a plurality of tones; and arrange the training field before and/or between the payload of the spatial streams to enable channel estimation by the second communication device.

Abstract: The present disclosure relates to the concept of preempting PPDUs, i.e., truncating a PPDU carrying non-latency sensitive traffic to serve STAs with latency constraints. A first communication device comprises circuitry configured to listen to an ongoing data exchange between a second communication device and a third communication device on a wireless channel, to estimate a reception duration of a data unit, to determine if the transmission of the data unit is truncated and/or if a truncation condition is met, the reception duration indicating the time of reception of the data unit by the third communication device if the data unit were not truncated, and, if the transmission of the data unit is truncated and/or if a truncation condition is met, receive a preemptive data unit from the second communication device or transmit a preemptive data unit to the second communication device.

Abstract: The present disclosure relates to the concept of preempting PPDUs, i.e., truncating a PPDU carrying non-latency sensitive traffic to serve STAs with latency constraints. A first communication device comprises circuitry configured to receive a truncation notification during an ongoing exchange of data units with a second communication device, the truncation notification indicating that the ongoing transmission of a data unit shall be truncated and a preemptive data unit shall be received from and/or transmitted to the third communication device, terminate the ongoing transmission of the data unit before the estimated transmission time of the data unit, and receive from and/or transmit to the third communication device the preemptive data unit within the remaining duration of the truncated data unit or within the remaining duration of the transmit opportunity, established between the first and the second communication devices for the ongoing data unit exchange.